If the diameter of cranial defect after craniocerebral trauma is larger than 3cm, the patient will often have headache, dizziness, easily agitated, and there will be localized fluctuation in the defect area. Moreover, cranial defects directly affect the aesthetic appearance, and patients will have low self-esteem, and will be very depressed for a long time. Cranial defects after traumatic brain injury need timely cranial repair surgery, if there are no contraindications to surgery, cranial repair surgery is recommended to be performed 3 months after the craniocerebral trauma. The purpose of cranial repair surgery is to rebuild a complete and closed cranial cavity for the patient, to restore a stable intracranial operating environment, and to provide protection for the cerebrospinal fluid circulation, blood circulation, and the operation of various cerebral and neural functions of the patient. However, in skull repair surgery, the choice of repair material is crucial, only to find a good repair material in order to see the ideal recovery results. The ideal material for cranial repair today is peek, which breaks the mold of traditional materials by providing excellent performance and eliminating the need to worry about postoperative discomfort. At present, our team is using peek material to do cranial bone repair surgery, we are better at cranial bone repair, the team continues to explore and improve and upgrade, technical innovation, while integrating the concept of cosmetic plastic surgery, to truly achieve the organic unity of the structural restoration, functional perfection and aesthetic appearance.